Good morning. I'm David Greene. It's the dawn of a new era at the Big Pit National Coal Mining Museum. The former mine in Wales celebrates the fossil fuel that sparked the Industrial Revolution. Now it's embracing solar energy. Renewable Energy World reports that 200 newly installed solar panels could save the property as much as $650,000 over 25 years on power. Put another way, the museum celebrating coal won't have to dig so deep to pay the electric bill. It's MORNING EDITION. Transcript provided by NPR, Copyright NPR.